i added nothing abnormal, just fed them last night at 10:30pm, woke up at 7am and all but him are dead, and readings had spiked from the normal ph of 6.5 to ph of 7.9. could one of the fish dying then being left in there for that long of a time raised it? also the parasite issue, theres alot of them floating in the water and Scooter was eating them.
If your nitrites and nitrates are high also, your ammonia likely is also. As misterking said, this is the direct result of overstocking the tank, and lack of proper maintainance.
Decay will normally lower not raise pH in an aquarium, so the overstocking issue did not raise your pH. When is the last time you had a 'normal pH of 6.5?' Do you have any shells, corals, white rocks, limestone as deco in the tank?
What is the pH of your tap water?
What 'parasite issue' is Scooter eating?
As already asked, readings of ammonia, nitrite and nitrate would be helpful.